从“巨头独秀”转向“多点开花”，美股这波反弹能走多远？

Core Insights - The recent surge in U.S. stock markets, particularly the NASDAQ and S&P 500 reaching all-time highs, is attributed not only to technology giants but also to broader sector participation, indicating potential for further gains throughout the summer [1][3]. Market Trends - Initially, U.S. stocks faced significant declines due to tariff concerns, with technology stocks leading the downturn. However, as fears of economic recession eased and trade relations improved, a strong rebound occurred, expanding beyond the tech sector to include financial, industrial, and utility sectors [3][4]. - Indicators show an expanding market participation, with the number of S&P 500 stocks closing above their 50-day moving average returning to levels seen during the 2016 election period, suggesting a strengthening technical outlook [3]. - The ratio of advancing to declining stocks reached a new high, further indicating broader market engagement [3]. Investment Strategies - Investors are increasingly diversifying their portfolios beyond technology stocks, with a focus on sectors previously overlooked. This shift is partly driven by concerns of missing out on market gains (FOMO trading) as tech valuations rise [4]. - Some professional investors are strategically reallocating their investments towards defense, finance, and international blue-chip stocks, seeking to reduce reliance on a single sector [4]. Sector Performance - Despite the overall market rally, small-cap stocks continue to lag behind major indices. Analysts suggest that a significant shift in investor risk appetite is necessary for small-cap stocks to catch up [6]. - Optimistic views exist regarding small-cap stocks, particularly local bank stocks, which are expected to benefit from lower financing costs due to potential Federal Reserve rate cuts and less exposure to tariff impacts [6]. Technology Sector Outlook - While other sectors are beginning to catch up, the dominance of technology giants remains strong in the short term, with AI optimism continuing to be a key theme supporting high valuations in the tech sector [5].